Lab Session 2-5

Question 1

Magnifies images ten times

Answer 1

Ocular lens

Question 2

Which lens has four different lenses

Answer 2

Objective

Question 3

100x is also known as

Answer 3

Immersion lens

Question 4

Only use lens paper to wipe surfaces

Answer 4

Ocular lens

Question 5

Use lens cleaning fluid and lens paper

Answer 5

Objective lens

Question 6

Pathogenic

Answer 6

Disease causing

Question 7

Clean workbench with

Answer 7

10% bleach

Question 8

Works best when near its highest position

Answer 8

Condenser

Question 9

True or false
Never move the condenser to decrease the amount of light coming through the microscope

Answer 9

True

Question 10

Switch objectives but the image should stay nearly in focus and only require minor adjustments with the fine focus

Answer 10

Parfocal

Question 11

When switching from 10x to 100x objective

Answer 11

Turn the fine focus to refocus the image

Question 12

We will rarely use

Answer 12

40x objective

Question 13

Always find an area of interest with 10x objective and then center it and switch to 100x objective

Answer 13

True

Question 14

Total magnification

Answer 14

1000x

Question 15

Ability to make small objects seem larger

Answer 15

Magnification

Question 16

Allows us to see fine details

Answer 16

Resolution

Question 17

Focuses light onto specimen

Answer 17

Purpose of condenser

Question 18

Minimize the loss of light

Answer 18

Oil immersion lens

Question 19

Why invert plates when incubating them

Answer 19

To prevent contamination and condensation

Question 20

Minimizes contamination by microorganisms floating in the air

Answer 20

Aseptic technique

Question 21

Why label each plate on the bottom

Answer 21

So you know it’s yours and what it contains

Question 22

Mass of cells

Answer 22

Colony

Question 23

Cfu

Answer 23

Colony forming units

Single microbial cell that gave bacteria to colony